C / C++ / MFC

15-Aug-04 10:23

This[^] article may help.

/ravi

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Roll the dice

---Mark---15-Aug-04 9:24

---Mark---

15-Aug-04 9:24

Does anybody have a simple "Roll the Dice" program?
I just need to get my hands on some working code to study.

I have been trying to build this program on my own but I get tripped up when trying to implement other functions besides main. I am a beginer, what can I say Blush | :O

-Thanks

Mark

As you journey through life take a minute every now and then to give a thought for the other fellow.
He could be plotting something.-Hagar the Horrible

Ravi Bhavnani15-Aug-04 10:17

15-Aug-04 10:17

---Mark--- wrote:
I am a beginer, what can I say
There's nothing wrong with that. We were (and still are in many ways) all beginners at one point.

While I don't have a working program, I can give you a hint to get you going: use the rand() function to obtain a random number. Restrict the random number to the interval [1..6] by using the % operator.

/ravi

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---Mark---15-Aug-04 21:11

---Mark---

15-Aug-04 21:11

Still working on my program.
And here is what I got so far:

#include <stdio.h>
#include <stdlib.h>

void showone();
void showtwo();
void showthree();
void showfour();
void showfive();
void showsix();
char getans();
void printlines(int n);

main()
{
int r;
char ans;

ans = getans();

while(ans== 'y')
{

r = rand()%6 + 1;

printlines(2);
if (r==1) showone();
if (r==2) showtwo();
if (r==3) showthree();
if (r==4) showfour();
if (r==5) showfive();
if (r==6) showsix();
printlines(2);

}

printlines(2);
}

char getans()
{
int ans;

printf("Throw y/n ?");
ans = -1;
while (ans == -1)
{
ans=getchar();
}
return ans;
}

void printlines(int n)
{
int i;

for(i=1 ; i<=n ; i++) printf("\n");
}
void showone()
{
printf("\n * \n");
}

void showtwo()
{
printf(" * \n\n");
printf(" * \n");
}

void showthree()
{
printf(" * \n");

printf(" * \n");
printf(" *\n");
}

void showfour()
{
printf(" * * \n\n");
printf(" * * \n");
}

void showfive()
{
printf(" * * \n");
printf(" * \n");
printf(" * * \n");
}

void showsix()
{
int i;

for(i=1 ; i>=3 ; i++) printf(" * * \n");
}

The problem I am having is I can't figure how to make it loop back to the y/n. How it is now it goes on forever. How can I make it ask "Throw y/n" each time?

Thanks
-Mark

As you journey through life take a minute every now and then to give a thought for the other fellow.
He could be plotting something.-Hagar the Horrible

Mike Beckerleg15-Aug-04 23:04

Mike Beckerleg

15-Aug-04 23:04

Try changing

ans = getans();<br />
<br />
while(ans== 'y')<br />
{<br />
  ...<br />
}

while(getans()=='y')<br />
{<br />
  ...<br />
}

That should make it ask the question each time.

mahade115-Aug-04 23:21

mahade1

15-Aug-04 23:21

Hi,

Try doing this:

void showone();
void showtwo();
void showthree();
void showfour();
void showfive();
void showsix();
char getans();
void printlines(int n);

void main()
{
int r;
char ans;

srand( (unsigned)time( NULL ) );

ans = getans();

while(ans== 'y')
{

r = rand()%6 + 1;

printlines(2);
if (r==1) showone();
if (r==2) showtwo();
if (r==3) showthree();
if (r==4) showfour();
if (r==5) showfive();
if (r==6) showsix();
printlines(2);

ans = getans();
}

printlines(2);
}

char getans()
{
int ans;

fflush(stdin );
printf("Throw y/n ?");
ans = -1;
while (ans == -1)
{
ans=getchar();
}
return ans;
}

void printlines(int n)
{
int i;

for(i=1 ; i<=n ; i++) printf("\n");
}
void showone()
{
printf("\n * \n");
}

void showtwo()
{
printf(" * \n\n");
printf(" * \n");
}

void showthree()
{
printf(" * \n");

printf(" * \n");
printf(" *\n");
}

void showfour()
{
printf(" * * \n\n");
printf(" * * \n");
}

void showfive()
{
printf(" * * \n");
printf(" * \n");
printf(" * * \n");
}

void showsix()
{
int i;

for(i=1 ; i<=3 ; i++) printf(" * * \n");
}

Regards,
Mahadevan

---Mark---16-Aug-04 13:28

---Mark---

16-Aug-04 13:28

What does the fflush() function do?

Thanks
-Mark

As you journey through life take a minute every now and then to give a thought for the other fellow.
He could be plotting something.-Hagar the Horrible

mahade116-Aug-04 18:52

mahade1

16-Aug-04 18:52

The fflush() function flushes the console input before u use getchar().

Giving command line arguments to VS 2003.

Henry miller16-Aug-04 3:33

Henry miller

16-Aug-04 3:33

Basicly what the other two guys said, except you might want a do/while loop and not a standard while loop. Look it up, the do while will always give you one roll before asking if you want to roll again.

I recomend "the art of computer programing" by Donald Knuth http://www-cs-faculty.stanford.edu/~knuth/taocp.html which describes random numbers in far more detail than you ever thought possible. These are unfortuntly advanced books, completing one should be considered equivelant to a PHD! Still you should be aware of them, and (if you can afford them) have them on the bookshelf.

What I want you to get from these books: random numbers have been the most popular subject in advanced computer science since before there was comptuer science. I estimate that 1/3rd of all PHDs in computer science studied random numbers (and there is still pleny of room for more study) Your simple program is not complete until you understand something about random numbers.

In particular, the most common implimentation of rand() will ALWAYS give a odd-even-odd-even sequence! This is not something you want I'm going to guess. Issues like this are what seperate simple programs like yours (that look just fine) from complex programs done by an expert. You can never know it all, but I've just given you an area to look.

blackmesa15-Aug-04 8:44

blackmesa

15-Aug-04 8:44

I'm having trouble giving command line arguments to VS.NET 2003 in debug mode without opening a prompt.

My debugging properties are as follows.

Command: cmd.exe
Command Arguments: -input test.scn -output test.tga.

(basically input scene description file and output image file)

When I start the debugger, argc is always 1, which means only the executable name was found in the command line. So my arguments are never read. I tried setting input to "test.scn", and output to "test.tga" in main(), same result (input and output are c++ strings in the main function). I also tried setting the working directory to .\Debug. without success. The test.scn file is in my project's Debug folder.

What am I missing?

Cheers, blackmesa.

Re: Giving command line arguments to VS 2003.

Ryan Binns15-Aug-04 18:22

Ryan Binns

15-Aug-04 18:22

Not sure about VS.NET 2003, but under VS6 you can specify command-line parameters under the Project Settings...

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Giving command line arguments to VS 2003.

blackmesa15-Aug-04 21:02

blackmesa

15-Aug-04 21:02

Well I'm specifying the arguments from the Project Properties, which is pretty much the equivalent of Project Settings under VC 6.

Cheers, blackmesa.

Windows VirtualDesktop

ianmknight15-Aug-04 8:41

ianmknight

15-Aug-04 8:41

Hello,

I am try to create a virtual desktop on windows 98SE and 2000.
Basically what I'm trying to do is to set the desktop to be twice as wide as the screen resolution. e.g. 2048x768 for the desktop and 1024x768 for the minitor resolution. Windows should then allow you to simple scroll the monitor (view port) left/right over the desktop... Easy..

So what I have tried is the SystemParametersInfo() call with the SPI_SETWORKAREA flag. However this call returns NULL, so I called GetlastError() and this returns 87 (INVALIDE_PARAMETER) This I think is due to the security mask ?? any ideas please..

Or better still have anyone written this and has some source.

Brgds Ian Knight

Can Any one Help me out

Neelesh K J Jain15-Aug-04 6:35

Neelesh K J Jain

15-Aug-04 6:35

Hello Friends,
How can I know the users of the system and which is the header file one has to go through for knowing the system properties like type of OS, users of the system, network card and its address etc.,
Thank you
Neelesh K J Jain.

Re: Can Any one Help me out

Ravi Bhavnani15-Aug-04 6:49

15-Aug-04 6:49

See these articles for starters:

CAMEL - CPU Identifier Class[^]

A comprehensive OS detection Class[^]

/ravi

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Need help fast...

Larsson15-Aug-04 3:55

Larsson

15-Aug-04 3:55

Hello,
When I compile the code at realese I get;

error C2065: 'IDD_LOGIN' : undeclared identifier

But when I run it in debug I don't get it.
How can I fix this?. Please help me.

Ravi Bhavnani15-Aug-04 4:21

15-Aug-04 4:21

Looks like you may have put your #include "resource.h" line (or the line that #includes your dialog's .h file) between the #ifdef DEBUG .. #endif block. It needs to be outside.

/ravi

My new year's resolution: 2048 x 1536
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Larsson15-Aug-04 4:44

Larsson

15-Aug-04 4:44

where can i change that??

Ravi Bhavnani15-Aug-04 4:47

15-Aug-04 4:47

Well, it's a little hard to say without having had the chance to look at any of your source code. Smile | :)

My guess is the problem lies in the .cpp file of a dialog class.

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com